Fuknace



(No Model.) 2 Sheets-Sheet 1.

J. GALT. FURNACE.

No. 460,469. Patented Sept. 29, 1891;

E1 E1 E1 E1 E1 EB F|q an Eu EB Eta EEB EH (N o Model.) 2 Sheets-Sheet 2.

J. GALT. FURNACE.

No. 460,469. Patented Sept. 29, 1891.

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WITNESSES flliorneys.

UNITED STATES PATENT OFFICE.

JOHN GALT, OF TORONTO, CANADA.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 460,469, datedSeptember 29, 1891.

Application filed August 18, 1890.

To all whom it may concern.-

Be it known that I, JOHN GALT, a subject of the Queen of Great Britain,residing at T0- ronto, county of York, Province of Ontario, Canada, haveinventeda certain new and useful Improvement in SectionalHeating-Furnaces; and I declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it pertains to make and use the same, referencebeing bad to the accompanying drawings, which form a part of thisspecification.

In the drawings, Figure 1 is a side elevation of my improved furnace.Fig. 2 is alongitudinal section by a vertical plane on 00 x of Fig. 3.Fig. 3 is a section by a horizontal plane on y y of Fig. 2. Fig. 4 is aseparate view of one of the sections. Fig. 5 is a separate view of oneof the sections made to serve as a bridge-wall. Fig. 6 is a half-frontand half-rear elevation.

It is the purpose of my invention to produce a new and improvedheating-furnace designed for steam or hot-water circulation; and myinvention consists, essentially, first, in adapting the apparatus tosecure and support the grate at a high level close to the upper stratumof water in the furnace, so that the most highly-heated products shallexpend their heat directly upon this upper stratum, leaving the lowerstrata to be heated by the said products after they shall have acted onthe upper stratum, the arrangement being such that they are\for theirpurpose deflected downward and through the lower portions of thefurnace; second, in the peculiar arrangement and construction of thesec-. tions in a sectional boiler and furnace for accomplishing thispurpose; also, in other special features of construction.

In carrying out my invention, A represents those sections of my boilerbetween the front and rear sections.

B represents the front and B the rear section, which are respectivelydesigned to make a front and rear finish and are provided withfuel-doors b, ash-pit doors I), cleaning-doors b and suitableflue-openings 1) b and with such other usual features as are found onthe Serial No. 362,338. (No model.)

front and rear of furnaces, such as dampers and the like for regulatingthe draft. Such a damper is shown at 0 represents a bridge-wall, formedby simply making one of the sections with this portion cast therewith,the same being hollow and constituting part of the water-space of thesaid section. It may, if desired, be so cast as to leave openings 0 atthe base, closed by suitable doors a, by opening which access can be hadfor cleaning out any dust or ashes that may have gathered in the spacesback of the bridge-wall.

D is the "grate, located high up, so as to bring the highly-heatedproducts, as well as the most intense radiation from the fuel-bed,directly against the upper portion of the water-tubes, thereby expendingthe greatest batting energy in heating the upper stratum of water,raising it quicklyto a steam-heat; or, if the furnace is used as awater-circulation, raising it quickly to the proper temperature forcirculation. Itis apparent that this is accomplished withoutcorrespondingly heating the lower strata of water, and so much needlessexpenditure of fuel for this purpose is avoided. On the other hand, thehighlyheated products, having expended their intense heat on the upperstratum, as above, are deflected downward and forward through fines E,provided for the purpose, and fines F are provided at the base for theirreturn again to the smoke-flue G. At the edges of each section are hubsA for uniting the sections at the base and permitting free circulationfrom one to the other, and similar hubs A at the top serve a likepurpose at this point. At suitable points steam or water outlet pipes Fmay be connected forleading the steam or water to the points to besuppied therewith, and suitablereturn-pipes F may be connected with thebase of any section or sections. These sections inay be united at theirhubs by suitably packing them and then binding each one to the adjacentone by suitable bolts passing through ears, as shown at aa,respectively, or bolts or clamps passing from front to rear of theentire furnace might simultaneously bind them all together, and if suchbolts are employed they may pass centrally through the hubs and bepacked at their ends, or they may be arranged externally of the sectionsin any convenient manner.

For starting the furnace the damper at b may be opened, producingadirect draft, and closed when the fire is fairly under way.

I11 a furnace thus constructed the upper portion and the hub-channel Aform the steam-gatherer when employed as a steamheater, but whenemployed as a water-heater,

the same hub-channel serves to maintain circulation at the top of thefurnace and prevents any accumulation of air in the top of the sections,causing said air to pass on through the circulating-pipes, to be drawnoff, as usual, at an expansion-chamber, where it may be collectedwithout disturbing the circulation.

I do not limit myself to the particular construction here shown, as thesame may be modified considerably without departing from the essentialfeatures of the invention.

This furnace, itis manifest, is well calculated to raise steam quicklyand economically by combining its greatest heating energy to the upperstratum, while at the same time it effectually extracts the remnants ofheat, imparting the same to the lower strata before reaching theexit-flue.

The drawingsshow the device arranged for a single grate and singlefire-chamber, witha middle dividing water-passage A formed with eachsection back of the bridge-wall. If it be desired to make the device inthe form of a double furnacei. 6., with two grates and two firechambersthese upright passages A might be continued forward of thebridgewall to the front of the furnace, and if necessary be so shaped asto leave very little space between them, and so make an effectualpartition between the said two firechambers.

I am aware that furnaces have been constructed with the fire-chamberlocated in the upper part thereof, but am not aware that such furnaceshave been made of sections so constructed that the water in each sectioncan 4 5 move straight to the top and in which circulation can be sorapid and free as in my construction. As the upper stratum of water issubject to intense heat, it is necessary that the circulation from thelower and cooler stratum should be as free and through as many points aspossible, and which I accomplish by allowing free passage from lower toupper part of each section as well as from section to section. In priorconstructions the water has been compelled to take as circuitous acourse in rising as is given to the products of combustion indescending.

lVhat I claim is 1. A steam or water heating furnace consisting ofsections, with means for uniting them and providing circulation of wateror steam from section to section, said sections being provided with afire-chamber in the upper part thereof, with a stratum of water aboveand around the same, and fines situated beneath said chamber forconductingheated products of combustion therefrom through said sectionsto the outlet, substantially as and for the purposes described.

2. A steam or water heating furnace con sisting of sections adapted tocirculate water or steam from base to top of each section and fromsection to section, said sections being provided with a fire-chamber inthe upper part thereof, with a stratum of water sur rounding the same,and flues situated beneath said chamber for conducting heated productsof combustion therefrom through said sections to outlet at the base ofsaid furnace, substantially as and for the purposes described.

In testimony whereof I sign this specification in the presence of twowitnesses.

JOHN GALT.

'Witnesses:

W. H. CHAMBERLIN, 0. J. SHIPLEY.

